void main() {
  //1．布尔类型
  bool showSheet = false;
  if (showSheet) {
    print('模态弹层已经打开');
  } else {
    print('模态弹层已经关闭');
  }

  //三元
  var isMarry = false;
  print(isMarry ? '已婚' : '未婚');

  //细节
  //细节1、flutter中不存在隐式转换，需要显示转换
  //var count =0；
  //print(!!count)

  //细节2、逻辑运算符
  //flutter中没有=== 只有==
  var count1 = 100;
  var count2 = 200;
  print(count1 == count2);
}
